release/src-rt-6.x.4708/linux/linux-2.6.36/arch/mips/pmc-sierra/msp71xx/msp_prom.c

   1 /*
   2  * BRIEF MODULE DESCRIPTION
   3  *    PROM library initialisation code, assuming a version of
   4  *    pmon is the boot code.
   5  *
   6  * Copyright 2000,2001 MontaVista Software Inc.
   7  * Author: MontaVista Software, Inc.
   8  *              ppopov@mvista.com or source@mvista.com
   9  *
  10  * This file was derived from Carsten Langgaard's
  11  * arch/mips/mips-boards/xx files.
  12  *
  13  * Carsten Langgaard, carstenl@mips.com
  14  * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
  15  *
  16  *  This program is free software; you can redistribute  it and/or modify it
  17  *  under  the terms of  the GNU General  Public License as published by the
  18  *  Free Software Foundation;  either version 2 of the  License, or (at your
  19  *  option) any later version.
  20  *
  21  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  22  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  23  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  24  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  25  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  26  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  27  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  28  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  29  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  30  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  *
  32  *  You should have received a copy of the  GNU General Public License along
  33  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  34  *  675 Mass Ave, Cambridge, MA 02139, USA.
  35  */
  36
  37 #include <linux/module.h>
  38 #include <linux/kernel.h>
  39 #include <linux/init.h>
  40 #include <linux/string.h>
  41 #include <linux/interrupt.h>
  42 #include <linux/mm.h>
  43 #include <linux/slab.h>
  44
  45 #include <asm/addrspace.h>
  46 #include <asm/bootinfo.h>
  47 #include <asm-generic/sections.h>
  48 #include <asm/page.h>
  49
  50 #include <msp_prom.h>
  51 #include <msp_regs.h>
  52
  53 /* global PROM environment variables and pointers */
  54 int prom_argc;
  55 char **prom_argv, **prom_envp;
  56 int *prom_vec;
  57
  58 /* debug flag */
  59 int init_debug = 1;
  60
  61 /* memory blocks */
  62 struct prom_pmemblock mdesc[PROM_MAX_PMEMBLOCKS];
  63
  64 /* default feature sets */
  65 static char msp_default_features[] =
  66 #if defined(CONFIG_PMC_MSP4200_EVAL) || defined(CONFIG_PMC_MSP4200_GW)
  67         "ERER";
  68 #elif defined(CONFIG_PMC_MSP7120_EVAL) \
  69  || defined(CONFIG_PMC_MSP7120_GW)
  70         "EMEMSP";
  71 #elif defined(CONFIG_PMC_MSP7120_FPGA)
  72         "EMEM";
  73 #endif
  74
  75 /* conversion functions */
  76 static inline unsigned char str2hexnum(unsigned char c)
  77 {
  78         if (c >= '0' && c <= '9')
  79                 return c - '0';
  80         if (c >= 'a' && c <= 'f')
  81                 return c - 'a' + 10;
  82         return 0; /* foo */
  83 }
  84
  85 static inline int str2eaddr(unsigned char *ea, unsigned char *str)
  86 {
  87         int index = 0;
  88         unsigned char num = 0;
  89
  90         while (*str != '\0') {
  91                 if ((*str == '.') || (*str == ':')) {
  92                         ea[index++] = num;
  93                         num = 0;
  94                         str++;
  95                 } else {
  96                         num = num << 4;
  97                         num |= str2hexnum(*str++);
  98                 }
  99         }
 100
 101         if (index == 5) {
 102                 ea[index++] = num;
 103                 return 0;
 104         } else
 105                 return -1;
 106 }
 107 EXPORT_SYMBOL(str2eaddr);
 108
 109 static inline unsigned long str2hex(unsigned char *str)
 110 {
 111         int value = 0;
 112
 113         while (*str) {
 114                 value = value << 4;
 115                 value |= str2hexnum(*str++);
 116         }
 117
 118         return value;
 119 }
 120
 121 /* function to query the system information */
 122 const char *get_system_type(void)
 123 {
 124 #if defined(CONFIG_PMC_MSP4200_EVAL)
 125         return "PMC-Sierra MSP4200 Eval Board";
 126 #elif defined(CONFIG_PMC_MSP4200_GW)
 127         return "PMC-Sierra MSP4200 VoIP Gateway";
 128 #elif defined(CONFIG_PMC_MSP7120_EVAL)
 129         return "PMC-Sierra MSP7120 Eval Board";
 130 #elif defined(CONFIG_PMC_MSP7120_GW)
 131         return "PMC-Sierra MSP7120 Residential Gateway";
 132 #elif defined(CONFIG_PMC_MSP7120_FPGA)
 133         return "PMC-Sierra MSP7120 FPGA";
 134 #else
 135         #error "What is the type of *your* MSP?"
 136 #endif
 137 }
 138
 139 int get_ethernet_addr(char *ethaddr_name, char *ethernet_addr)
 140 {
 141         char *ethaddr_str;
 142
 143         ethaddr_str = prom_getenv(ethaddr_name);
 144         if (!ethaddr_str) {
 145                 printk(KERN_WARNING "%s not set in boot prom\n", ethaddr_name);
 146                 return -1;
 147         }
 148
 149         if (str2eaddr(ethernet_addr, ethaddr_str) == -1) {
 150                 printk(KERN_WARNING "%s badly formatted-<%s>\n",
 151                         ethaddr_name, ethaddr_str);
 152                 return -1;
 153         }
 154
 155         if (init_debug > 1) {
 156                 int i;
 157                 printk(KERN_DEBUG "get_ethernet_addr: for %s ", ethaddr_name);
 158                 for (i = 0; i < 5; i++)
 159                         printk(KERN_DEBUG "%02x:",
 160                                 (unsigned char)*(ethernet_addr+i));
 161                 printk(KERN_DEBUG "%02x\n", *(ethernet_addr+i));
 162         }
 163
 164         return 0;
 165 }
 166 EXPORT_SYMBOL(get_ethernet_addr);
 167
 168 static char *get_features(void)
 169 {
 170         char *feature = prom_getenv(FEATURES);
 171
 172         if (feature == NULL) {
 173                 /* default features based on MACHINE_TYPE */
 174                 feature = msp_default_features;
 175         }
 176
 177         return feature;
 178 }
 179
 180 static char test_feature(char c)
 181 {
 182         char *feature = get_features();
 183
 184         while (*feature) {
 185                 if (*feature++ == c)
 186                         return *feature;
 187                 feature++;
 188         }
 189
 190         return FEATURE_NOEXIST;
 191 }
 192
 193 unsigned long get_deviceid(void)
 194 {
 195         char *deviceid = prom_getenv(DEVICEID);
 196
 197         if (deviceid == NULL)
 198                 return *DEV_ID_REG;
 199         else
 200                 return str2hex(deviceid);
 201 }
 202
 203 char identify_pci(void)
 204 {
 205         return test_feature(PCI_KEY);
 206 }
 207 EXPORT_SYMBOL(identify_pci);
 208
 209 char identify_pcimux(void)
 210 {
 211         return test_feature(PCIMUX_KEY);
 212 }
 213
 214 char identify_sec(void)
 215 {
 216         return test_feature(SEC_KEY);
 217 }
 218 EXPORT_SYMBOL(identify_sec);
 219
 220 char identify_spad(void)
 221 {
 222         return test_feature(SPAD_KEY);
 223 }
 224 EXPORT_SYMBOL(identify_spad);
 225
 226 char identify_tdm(void)
 227 {
 228         return test_feature(TDM_KEY);
 229 }
 230 EXPORT_SYMBOL(identify_tdm);
 231
 232 char identify_zsp(void)
 233 {
 234         return test_feature(ZSP_KEY);
 235 }
 236 EXPORT_SYMBOL(identify_zsp);
 237
 238 static char identify_enetfeature(char key, unsigned long interface_num)
 239 {
 240         char *feature = get_features();
 241
 242         while (*feature) {
 243                 if (*feature++ == key && interface_num-- == 0)
 244                         return *feature;
 245                 feature++;
 246         }
 247
 248         return FEATURE_NOEXIST;
 249 }
 250
 251 char identify_enet(unsigned long interface_num)
 252 {
 253         return identify_enetfeature(ENET_KEY, interface_num);
 254 }
 255 EXPORT_SYMBOL(identify_enet);
 256
 257 char identify_enetTxD(unsigned long interface_num)
 258 {
 259         return identify_enetfeature(ENETTXD_KEY, interface_num);
 260 }
 261 EXPORT_SYMBOL(identify_enetTxD);
 262
 263 unsigned long identify_family(void)
 264 {
 265         unsigned long deviceid;
 266
 267         deviceid = get_deviceid();
 268
 269         return deviceid & CPU_DEVID_FAMILY;
 270 }
 271 EXPORT_SYMBOL(identify_family);
 272
 273 unsigned long identify_revision(void)
 274 {
 275         unsigned long deviceid;
 276
 277         deviceid = get_deviceid();
 278
 279         return deviceid & CPU_DEVID_REVISION;
 280 }
 281 EXPORT_SYMBOL(identify_revision);
 282
 283 /* PROM environment functions */
 284 char *prom_getenv(char *env_name)
 285 {
 286         /*
 287          * Return a pointer to the given environment variable.  prom_envp
 288          * points to a null terminated array of pointers to variables.
 289          * Environment variables are stored in the form of "memsize=64"
 290          */
 291
 292         char **var = prom_envp;
 293         int i = strlen(env_name);
 294
 295         while (*var) {
 296                 if (strncmp(env_name, *var, i) == 0) {
 297                         return (*var + strlen(env_name) + 1);
 298                 }
 299                 var++;
 300         }
 301
 302         return NULL;
 303 }
 304
 305 /* PROM commandline functions */
 306 void  __init prom_init_cmdline(void)
 307 {
 308         char *cp;
 309         int actr;
 310
 311         actr = 1; /* Always ignore argv[0] */
 312
 313         cp = &(arcs_cmdline[0]);
 314         while (actr < prom_argc) {
 315                 strcpy(cp, prom_argv[actr]);
 316                 cp += strlen(prom_argv[actr]);
 317                 *cp++ = ' ';
 318                 actr++;
 319         }
 320         if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */
 321                 --cp;
 322         *cp = '\0';
 323 }
 324
 325 /* memory allocation functions */
 326 static int __init prom_memtype_classify(unsigned int type)
 327 {
 328         switch (type) {
 329         case yamon_free:
 330                 return BOOT_MEM_RAM;
 331         case yamon_prom:
 332                 return BOOT_MEM_ROM_DATA;
 333         default:
 334                 return BOOT_MEM_RESERVED;
 335         }
 336 }
 337
 338 void __init prom_meminit(void)
 339 {
 340         struct prom_pmemblock *p;
 341
 342         p = prom_getmdesc();
 343
 344         while (p->size) {
 345                 long type;
 346                 unsigned long base, size;
 347
 348                 type = prom_memtype_classify(p->type);
 349                 base = p->base;
 350                 size = p->size;
 351
 352                 add_memory_region(base, size, type);
 353                 p++;
 354         }
 355 }
 356
 357 void __init prom_free_prom_memory(void)
 358 {
 359         int     argc;
 360         char    **argv;
 361         char    **envp;
 362         char    *ptr;
 363         int     len = 0;
 364         int     i;
 365         unsigned long addr;
 366
 367         /*
 368          * preserve environment variables and command line from pmon/bbload
 369          * first preserve the command line
 370          */
 371         for (argc = 0; argc < prom_argc; argc++) {
 372                 len += sizeof(char *);                  /* length of pointer */
 373                 len += strlen(prom_argv[argc]) + 1;     /* length of string */
 374         }
 375         len += sizeof(char *);          /* plus length of null pointer */
 376
 377         argv = kmalloc(len, GFP_KERNEL);
 378         ptr = (char *) &argv[prom_argc + 1];    /* strings follow array */
 379
 380         for (argc = 0; argc < prom_argc; argc++) {
 381                 argv[argc] = ptr;
 382                 strcpy(ptr, prom_argv[argc]);
 383                 ptr += strlen(prom_argv[argc]) + 1;
 384         }
 385         argv[prom_argc] = NULL;         /* end array with null pointer */
 386         prom_argv = argv;
 387
 388         /* next preserve the environment variables */
 389         len = 0;
 390         i = 0;
 391         for (envp = prom_envp; *envp != NULL; envp++) {
 392                 i++;            /* count number of environment variables */
 393                 len += sizeof(char *);          /* length of pointer */
 394                 len += strlen(*envp) + 1;       /* length of string */
 395         }
 396         len += sizeof(char *);          /* plus length of null pointer */
 397
 398         envp = kmalloc(len, GFP_KERNEL);
 399         ptr = (char *) &envp[i+1];
 400
 401         for (argc = 0; argc < i; argc++) {
 402                 envp[argc] = ptr;
 403                 strcpy(ptr, prom_envp[argc]);
 404                 ptr += strlen(prom_envp[argc]) + 1;
 405         }
 406         envp[i] = NULL;                 /* end array with null pointer */
 407         prom_envp = envp;
 408
 409         for (i = 0; i < boot_mem_map.nr_map; i++) {
 410                 if (boot_mem_map.map[i].type != BOOT_MEM_ROM_DATA)
 411                         continue;
 412
 413                 addr = boot_mem_map.map[i].addr;
 414                 free_init_pages("prom memory",
 415                                 addr, addr + boot_mem_map.map[i].size);
 416         }
 417 }
 418
 419 struct prom_pmemblock *__init prom_getmdesc(void)
 420 {
 421         static char     memsz_env[] __initdata = "memsize";
 422         static char     heaptop_env[] __initdata = "heaptop";
 423         char            *str;
 424         unsigned int    memsize;
 425         unsigned int    heaptop;
 426         int i;
 427
 428         str = prom_getenv(memsz_env);
 429         if (!str) {
 430                 ppfinit("memsize not set in boot prom, "
 431                         "set to default (32Mb)\n");
 432                 memsize = 0x02000000;
 433         } else {
 434                 memsize = simple_strtol(str, NULL, 0);
 435
 436                 if (memsize == 0) {
 437                         /* if memsize is a bad size, use reasonable default */
 438                         memsize = 0x02000000;
 439                 }
 440
 441                 /* convert to physical address (removing caching bits, etc) */
 442                 memsize = CPHYSADDR(memsize);
 443         }
 444
 445         str = prom_getenv(heaptop_env);
 446         if (!str) {
 447                 heaptop = CPHYSADDR((u32)&_text);
 448                 ppfinit("heaptop not set in boot prom, "
 449                         "set to default 0x%08x\n", heaptop);
 450         } else {
 451                 heaptop = simple_strtol(str, NULL, 16);
 452                 if (heaptop == 0) {
 453                         /* heaptop conversion bad, might have 0xValue */
 454                         heaptop = simple_strtol(str, NULL, 0);
 455
 456                         if (heaptop == 0) {
 457                                 /* heaptop still bad, use reasonable default */
 458                                 heaptop = CPHYSADDR((u32)&_text);
 459                         }
 460                 }
 461
 462                 /* convert to physical address (removing caching bits, etc) */
 463                 heaptop = CPHYSADDR((u32)heaptop);
 464         }
 465
 466         /* the base region */
 467         i = 0;
 468         mdesc[i].type = BOOT_MEM_RESERVED;
 469         mdesc[i].base = 0x00000000;
 470         mdesc[i].size = PAGE_ALIGN(0x300 + 0x80);
 471                 /* jtag interrupt vector + sizeof vector */
 472
 473         /* PMON data */
 474         if (heaptop > mdesc[i].base + mdesc[i].size) {
 475                 i++;                    /* 1 */
 476                 mdesc[i].type = BOOT_MEM_ROM_DATA;
 477                 mdesc[i].base = mdesc[i-1].base + mdesc[i-1].size;
 478                 mdesc[i].size = heaptop - mdesc[i].base;
 479         }
 480
 481         /* end of PMON data to start of kernel -- probably zero .. */
 482         if (heaptop != CPHYSADDR((u32)_text)) {
 483                 i++;    /* 2 */
 484                 mdesc[i].type = BOOT_MEM_RAM;
 485                 mdesc[i].base = heaptop;
 486                 mdesc[i].size = CPHYSADDR((u32)_text) - mdesc[i].base;
 487         }
 488
 489         /*  kernel proper */
 490         i++;                    /* 3 */
 491         mdesc[i].type = BOOT_MEM_RESERVED;
 492         mdesc[i].base = CPHYSADDR((u32)_text);
 493         mdesc[i].size = CPHYSADDR(PAGE_ALIGN((u32)_end)) - mdesc[i].base;
 494
 495         /* Remainder of RAM -- under memsize */
 496         i++;                    /* 5 */
 497         mdesc[i].type = yamon_free;
 498         mdesc[i].base = mdesc[i-1].base + mdesc[i-1].size;
 499         mdesc[i].size = memsize - mdesc[i].base;
 500
 501         return &mdesc[0];
 502 }